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SECTION 6
WEIGHT AND BALANCE EQUIPMENT LIST
CG
o
CG is critical to the efficient operation of any AV
o
When components are shifted, the CG will be altered.
o
The main components which are moved on a regular basis are the sensors and the batteries.
o
The sensors are typically in the front of the AV, and the batteries are located in the correct
position to offset all the components on the AV.
o
The CG must be tested after any change to the components or their placement.
o
The CG should be tested by lifting the UV with fingers on the bottom of the arms. Check all 3
pairs of arms. The CG should be no more than 2mm off in any on the 3 checks. The closer the
CG is to the centerlines of the arms the more efficient and the more stable the AV will be.
WEIGHT
o
Weight is critical to the operation of any aircraft
o
Weight is especially critical to a rotor wing aircraft. At full throttle the motors have a finite
amount of thrust. All the weight is lifted by the battery power, there is no wing to assist in
providing lift.
o
As the batteries are operated, they lose power. At full charge they have about 25v. At 20%
remaining capacity they have about 21v. This is a loss of 8% of the power available which is
significant.
o
Do not overload the aircraft or there will not be sufficient reserve power to maneuver at low
battery levels.
